426
FNCA52 TJSJ 090904
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
504 AM AST FRI JAN 9 2026
DISCUSSION
EAST-NORTHEAST WINDS WILL BRING A PATCH OF MOISTURE IN THE
AFTERNOON, RESULTING IN SHOWERS ACROSS THE INTERIOR AND WESTERN
PR. THE US VIRGIN ISLANDS WILL HAVE LITTLE TO NO RAIN TODAY. RH
VALUES WILL DROP INTO THE 40S ACROSS THE SOUTHERN PLAINS. HOWEVER,
NORTHEAST WINDS SHOULD RANGE BETWEEN 10 AND 16 MPH WITH HIGHER
GUSTS. THEREFORE, THE FIRE DANGER REMAIN LOW.
PRZ014-100915-
SOUTHEAST COASTAL PLAINS-
504 AM AST FRI JAN 9 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 20
TEMP (24H TREND) 87 (+2) 68 (-1) 88
RH % (24H TREND) 48 (-11) 92 (+5) 46
WIND 20FT/EARLY(MPH) E 13 G19 NE 10 E 17 G23
WIND 20FT/LATE(MPH) E 13 G19 NE 10 E 17 G23
MIXING HGT(FT-AGL/MSL)4460 5420
TRANSPORT WND (MPH) E 10 E 14
VENT RATE (KT-FT) 40140 65040
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-100915-
SOUTHERN HILLS-
504 AM AST FRI JAN 9 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 30
TEMP (24H TREND) 83 (+3) 65 (-1) 83
RH % (24H TREND) 63 (-1) 98 (+5) 61
WIND 20FT/EARLY(MPH) E 10 NE 10 E 12
WIND 20FT/LATE(MPH) E 10 NE 10 E 12
MIXING HGT(FT-AGL/MSL)4750 5800
TRANSPORT WND (MPH) E 9 E 14
VENT RATE (KT-FT) 38000 69600
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-100915-
NORTH COASTAL PLAINS-
504 AM AST FRI JAN 9 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 20 30
TEMP (24H TREND) 85 (+1) 68 (-1) 85
RH % (24H TREND) 66 (0) 100 (+3) 64
WIND 20FT/EARLY(MPH) NE 14 E 12 E 17 G19
WIND 20FT/LATE(MPH) NE 14 E 12 E 17 G19
MIXING HGT(FT-AGL/MSL)4760 4980
TRANSPORT WND (MPH) E 13 E 17
VENT RATE (KT-FT) 52360 74700
DISPERSION 5 5
DSI 5 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-100915-
NORTHERN HILLS-
504 AM AST FRI JAN 9 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 20
TEMP (24H TREND) 84 (+2) 66 (0) 84
RH % (24H TREND) 65 (0) 99 (+2) 64
WIND 20FT/EARLY(MPH) NE 12 E 11 NE 14
WIND 20FT/LATE(MPH) NE 12 E 11 NE 14
MIXING HGT(FT-AGL/MSL)4940 5410
TRANSPORT WND (MPH) E 10 E 16
VENT RATE (KT-FT) 44460 75740
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-100915-
WEST COAST-
504 AM AST FRI JAN 9 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 40
TEMP (24H TREND) 87 (+2) 66 (-1) 87
RH % (24H TREND) 58 (-4) 98 (+3) 60
WIND 20FT/EARLY(MPH) E 16 NE 14 E 16
WIND 20FT/LATE(MPH) E 16 NE 14 E 16
MIXING HGT(FT-AGL/MSL)4240 4860
TRANSPORT WND (MPH) E 5 E 12
VENT RATE (KT-FT) 16960 48600
DISPERSION 5 5
DSI 5 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-100915-
EASTERN INTERIOR-
504 AM AST FRI JAN 9 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 40
TEMP (24H TREND) 83 (+1) 66 (-2) 83
RH % (24H TREND) 68 (+2) 99 (+2) 66
WIND 20FT/EARLY(MPH) E 10 NE 10 NE 11
WIND 20FT/LATE(MPH) E 10 NE 10 NE 11
MIXING HGT(FT-AGL/MSL)4900 5620
TRANSPORT WND (MPH) E 10 E 13
VENT RATE (KT-FT) 44100 61820
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-100915-
LUQUILLO MOUNTAIN RANGE-
504 AM AST FRI JAN 9 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 50
TEMP (24H TREND) 79 (+2) 64 (-3) 79
RH % (24H TREND) 72 (+2) 100 (+1) 72
WIND 20FT/EARLY(MPH) E 8 NE 8 E 10
WIND 20FT/LATE(MPH) E 8 NE 8 E 10
MIXING HGT(FT-AGL/MSL)4610 4140
TRANSPORT WND (MPH) E 10 E 14
VENT RATE (KT-FT) 41490 49680
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-100915-
CENTRAL MOUNTAIN RANGE-
504 AM AST FRI JAN 9 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 30
TEMP (24H TREND) 81 (+2) 63 (-1) 81
RH % (24H TREND) 63 (-1) 99 (+2) 63
WIND 20FT/EARLY(MPH) NE 10 NE 10 NE 12
WIND 20FT/LATE(MPH) NE 10 NE 10 NE 12
MIXING HGT(FT-AGL/MSL)5560 6220
TRANSPORT WND (MPH) E 8 E 13
VENT RATE (KT-FT) 38920 68420
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-100915-
CAYEY MOUNTAIN RANGE-
504 AM AST FRI JAN 9 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 30
TEMP (24H TREND) 78 (0) 65 (-1) 79
RH % (24H TREND) 73 (+4) 99 (+1) 71
WIND 20FT/EARLY(MPH) E 9 NE 8 E 11
WIND 20FT/LATE(MPH) E 9 NE 8 E 11
MIXING HGT(FT-AGL/MSL)4660 5220
TRANSPORT WND (MPH) E 12 E 15
VENT RATE (KT-FT) 46600 67860
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-100915-
VIEQUES-
504 AM AST FRI JAN 9 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 50
TEMP (24H TREND) 85 (0) 70 (-2) 85
RH % (24H TREND) 61 (+1) 97 (+1) 60
WIND 20FT/EARLY(MPH) E 11 NE 12 NE 13 G17
WIND 20FT/LATE(MPH) E 11 NE 12 NE 13 G17
MIXING HGT(FT-AGL/MSL)3520 3400
TRANSPORT WND (MPH) NE 12 E 17
VENT RATE (KT-FT) 35200 51000
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-100915-
CULEBRA-
504 AM AST FRI JAN 9 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 50
TEMP (24H TREND) 85 (0) 72 (-2) 86
RH % (24H TREND) 61 (-1) 96 (+4) 61
WIND 20FT/EARLY(MPH) E 10 NE 12 E 13 G17
WIND 20FT/LATE(MPH) E 10 NE 12 E 13 G17
MIXING HGT(FT-AGL/MSL)3470 3370
TRANSPORT WND (MPH) NE 12 NE 17
VENT RATE (KT-FT) 34700 50550
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-100915-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
504 AM AST FRI JAN 9 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 50
TEMP (24H TREND) 88 (+2) 67 (-1) 88
RH % (24H TREND) 42 (-15) 93 (+3) 46
WIND 20FT/EARLY(MPH) E 12 NE 14 E 17 G22
WIND 20FT/LATE(MPH) E 12 NE 14 E 17 G22
MIXING HGT(FT-AGL/MSL)4440 5430
TRANSPORT WND (MPH) E 8 E 12
VENT RATE (KT-FT) 31080 54300
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-100915-
SAINT THOMAS AND SAINT JOHN-
504 AM AST FRI JAN 9 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 30
TEMP (24H TREND) 85 (+1) 72 (-2) 85
RH % (24H TREND) 60 (-3) 96 (+3) 61
WIND 20FT/EARLY(MPH) E 11 NE 13 G17 E 13 G17
WIND 20FT/LATE(MPH) E 11 NE 13 G17 E 13 G17
MIXING HGT(FT-AGL/MSL)3460 3430
TRANSPORT WND (MPH) E 10 E 16
VENT RATE (KT-FT) 31140 48020
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-100915-
ST CROIX-
504 AM AST FRI JAN 9 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 50
TEMP (24H TREND) 86 (+1) 72 (-2) 86
RH % (24H TREND) 61 (-3) 95 (+3) 62
WIND 20FT/EARLY(MPH) E 11 NE 13 E 13 G17
WIND 20FT/LATE(MPH) E 11 NE 13 E 13 G17
MIXING HGT(FT-AGL/MSL)4720 4610
TRANSPORT WND (MPH) E 13 E 18
VENT RATE (KT-FT) 51920 73760
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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